Pilot Operated Control Valve

VAG (Germany) has launched its VAG PICO Pilot Operated Control Valve. The control valve serves to reliably regulate pressures and water levels in tanks. The valve offers maximum functional reliability and durability due to new components, for which patent applications have been filed, and new corrosion protection properties.

The valve’s consistent, long-lasting valve corrosion protection extends beyond the quality specifications issued by the European Quality Association for Heavy Duty Corrosion Protection (GSK), for example through the control circuit made entirely of stainless steel or the anti-filtration, high-alloy weld overlay on the valve seat. The VAG PICO Pilot Operated Control Valve is also fitted with CORFIX technology, for which a patent application has been filed. The press-fitted stainless steel covers with O-ring seals are used for mounting the control circuit onto the main valve and the dome. This technology prevents exposed cast areas and resulting corrosion from developing on the control lines, thus guaranteeing the functional reliability of the valve.

The control device is already installed in the standard model of the new control valve and is directly connected to the stem. This means that the valve stroke is used even better, fine regulation characteristics are achieved and operation is cavitation-free. The preformed membrane is another advantage, since it can be installed and removed independently of its position as well as providing additional sealing functions on the stem and between the bonnet and the body. When the bonnet is removed the membrane support plate can easily be taken out of the valve for maintenance work to be carried out on the inner parts.

The large-profile valve seal is installed in a groove so that it cannot unintentionally come out of the holder even when the water is flowing fast. Drinking water authorisation according to the DVWG W 270 hygiene certificate for all the gaskets and membranes guarantees the hygienic safety of the control valve.

No local electrical infrastructure is required for using the control valve, since it is controlled completely independently by its own medium.